Is this ok? And do you have any tips to improve the way I cook steak?

This knife belonged to my great grandfather. I don’t know if he bought it or how he got it. Do you have any idea what kind of knife it is or what its value would be? I am from Romania and I dont think he ever left the country.

Does anyone know the aproximate value of this knife? I am from Romania. I think this knife is from WWI

Does this look ok? Do you have any tips for me?

Dors anyone know how much this knife would cost?